Share Email Facebook Twitter LinkedIn PipePressureDropData.Friction Property The friction of the pipe. Units: (kg/(ft²·s²)). Namespace: Autodesk.Revit.DB.PlumbingAssembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0) Syntax C# public double Friction { get; set; }Property ValueDouble See AlsoReferencePipePressureDropData ClassAutodesk.Revit.DB.Plumbing Namespace